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f <br /> Subsurface Investigation December 12, 1990 <br />' Former Unocal Station No. 2859, Stockton, California AGS 38012-5 <br /> TABLE 4 <br /> CONCENTRATIONS OF HYDROCARBONS IN SOIL AND WATER SAMPLES <br /> Former Unocal Service Station No. 2859 <br /> 1665 Pacific Avenue <br /> Stockton, California <br />' (August, 1989) <br /> Sample Depth Ethyl- Total <br />' Number (Feet) TPHg Benzene Toluene benzene Xylenes <br /> S-42-B4 42 <1.0 <0. 1 <0.1 <0. 1 <0. 1 <br /> S-40-B5 40 <2 . 0 <0. 05 <0.05 <0. 05 <0.05 <br />' S-20-B6 20 <2 .0 <0. 05 <0.05 <0. 05 <0. 05 <br /> S-40-B6 40 <2 . 0 <0. 05 <0. 05 <0. 05 <0.05 <br />' W-43-MW4 150 <0. 50 <0.50 <0.50 1.4 <br /> W-43-MW5 240 <0.50 <0.50 8 . 1 1.9 <br /> Results of soil in parts per million (ppm) <br /> Results of water in parts per billion (ppb) <br /> TPHg = Total petroleum hydrocarbons as gasoline <br /> < = Below detection limit for analysis used. <br />' S-40--B6 - <br /> - Soil boring number <br /> Sample depth in feet below surface <br /> Soil sample <br />' W-43-MfW5 <br /> Water sample number;collected August 28, 1989 . <br />' Sample depth in feet below surface. <br /> Water <br /> I <br /> z <br /> I <br /> 13 <br /> App/ied GeOSystems <br />